Percutaneous pulmonary valve replacement in a large right ventricular outflow tract
An experimental study
Younes Boudjemline, MD* ,*,
Gabriella Agnoletti, MD*,
Damien Bonnet, MD*,
Daniel Sidi, MD* and
Philipp Bonhoeffer, MD
* Service de Cardiologie Pédiatrique, Hôpital Necker Enfants Malades, Paris, France
INSERM EMIU 0016, Faculté de Necker Enfants Malades, Paris, France
Cardiothoracic Unit, Great Ormond Street Hospital, London, United Kingdom
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Figure 1 (A) The newly designed stent is shown uncovered. The extremities have a diameter of 30 mm, whereas the central part is 18 mm. (B) A polytetrafluoroethylene membrane is covering the stent to ensure sealing of the device.
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Figure 2 A front view of the stent, showing the valve in the closed position, as seen from the ventricular side.
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Figure 3 Angiogram showing the perfect competence of the 18-mm implanted valve (equivalent of a lateral view). Note the size of the pulmonary artery trunk as compared with the size of the restricted area where the valve is located.
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Figure 4 Macroscopic views showing a newly designed, valved nitinol stent explanted two months after implantation. Note the fibrous covering of the nitinol wires and the thin valve inside the stent.
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Figure 5 Lateral view of right ventriculogram showing perfect sealing of the device.
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